Portable sprayer



Feb. 5, 1946- R. w. WILKINSON ET'AL 7 2,394,415

PORTABLE SPRAYER Filed Nov. 29, 1944 Patented F ch. 5, 1946 Ralph. W. Wilkinson and Clarence E. Wilkinson,-

Kansas City, Mo;

Application November 29, 1944. Serial N6. 565,605

(or. seer-sew Claim.

This invention relates to improvements in portable sprayers for use in spraying vegetables,. flowers,. trees and other vegetation with a toxic mix-- ture for the control of insects, fungus growth and other types of. blight. It relates. more particularly to improvements in. sprayers utilizing a tank divided into two compartments by afiexibl'e partition, which compartments are alternately filled and emptied with a toxic spraying mixture. The liquid supplied under pressure to one compartment forces accumrnulated spraying. mixture from the opposite compartment through a spray device.

Conventional sprayers of this type, such as disclosed in the United States Patent I',83l,979 issued November 17, 1931,. utilize a manually operated valve for controlling the flow of liquid to the empty compartments and the discharge of liq-- uid from the filled compartment.

' An important object of this invention is to provide a sprayer with automatic valves for simultaneously switching the liquid supply from a filled compartment to an empty compartment and the dischargefrom an empty compartment to afill'ed compartment by reversal of the tank.

Another object is the manner of introducing the toxicmaterial to the fluid.

A further object is its simplicity, ease ofv operation and facility of cleaning- Other and further objects of this inventionwill appear from the following description.-

In the accompanying drawing, which forms a part of the specification and which is to be read in conjunction therewith and in which like reference numerals are employed to indicate like parts in the various views,

Fig. 1 is a plan View of a sprayer embodying the invention,

Fig. 2 is a side view of the sprayer partially in section,

Fig. 3 is an enlarged sectional sideview ot the sprayer with the center section of the assembly broken away, and

Fig. 4. is a sectional side view showing a modifiedtype of intake valve.

Referring to the drawing the numeral l-[ldesignates a cylindrical tank closed at one end by an integrally formed plate Illa and atthe other end byaheadplate or cover H bolted to flange b. Wheels l2 are bolted to head. plate It by a suitable bracket !3 and at the other end of the tank: is a handle I lie. A flexible bag or partition- M of waterproof material is fastened at its open end in tank l0 between flange lb and plate ll forming a liq-uid -tight seal therebetween. Bag l4 divides the tank into two compartments 10d and Ma of variable capacities. Stop cook 15 serves as an. air release valve or liquiddrainvalve for compartment l'fld.

Manifolds t6- and IT surround the tank. and are each connected to inletvalve 18 and discharge valve [9' positioned at opposite ends of the tank.

Manifoldv I6 is connected; to compartment [0d by pipe Ilia and manifold II is connectedlto compartment Me by pipe liar Inlet valve body l8, through connections hereinafter explained. receives water from the city tapthrough hose: 20

and valve 2|. I

Discharge valve i9 is connected. by hose 2 2 to spray device 2 3.. The valve body H! has end. caps in. which are valve seats 18a and. l'ab and which are screw threaded. to receive the ends of. maniiolds t6 and I'll. A ball 24' is free to move within the: valve body L8 and seats. at the: lower end of the valve according to the position otthe tank. The water supplied through a hose. 20 is therefore directed. through'the-topof the valve, thence to one of the compartments through one of. the manifolds H5 or II. 0bviously, the reversal o-f. the tank inverts the valve l8 changing. the direction oi flow of water therethrouglr and; directs the water to the opposite compartment. 're dissolve or suspend a toxic material or poison in: the Water supplied to the compartments there is interposed inthe charging. line between valve l8 and valve: 2 I a reservoir or charger 25.- This charger is a short pieceof pipe threaded at its ends. to

on seat 28 closing the upper manifold outlet.. Ob-

viously, when one compartment isconnected to theliquidsupply the opposite compartment is connected to the spray device 23,-

It is believed that the operation of the sprayer is: apparent fromthe foregoing. descriptiom. Th sprayer is ccnnect-ed: to a suitable supply of water under pressure; such as a. city" water tap,. with valve 2! shut off. Thesprayer is rolled: to: a desired. location and the: handle end. is lowered to I rest: on the ground, i'na osition: shown in Fig. 2,

pl'acirrg both inlet valve I 8 and discharge: valve to invertical or operative'positions. Charger 25 is filled with the desired toxic materialand air tained in the bag through the sprayer 23 The reservoir 25 may be toxic materials a explained and the tank reversed supplying a substantially continuou fortoxic material at the ends.

der 2Tis directed through the upper reservoir 21b.

within the scope of the claims.

water enters the sprayer passing through charger 25 where it dissolves or mixe with the toxic material. The mixture passes into compartment Hid, the lower ball inthe inlet valve and the upper ball in the discharge valve beingseated. The pressure of the toxic mixture in compartment d collapses bagl l ejecting anygair or liquid con- When compartment ltld is filled with a spraying mixture valve 2| and vent l5 are closed. To fill the other compartment and to eject the .spraying mixture from the compartment Hid the tank is reversed on it longitudinalaxis; the axle ofthe 115 to be sprayed, means connecting each compart- L ment with theliquidsupply connection, the spray ground wheels serving as a pivot and the handle end rotated through 180. The pressure relief valve 25a is now opened to relieve any pressure inthe charger before replenishing it with toxic material 'lhe charger 2 5 is again filled with *toxicmaterial and its top removable cap replaced. Valve 2i is again opened-and the toxic spraying mixture is now supplied under pressure to compartment I ia within the bag in the same fashion as mixture was previously supplied compartment llld. The spraying mixture previously supplied to compartment llldisforcedout through pipes "|5a,.manif old l6; discharge valve'l9, hose 22 and the sprayer 23. Duringthis operation the upper ball in the discharge valve is kept seated by the mixture being charged to the'flexible bag compartment Ma. r

repeatedly filled with source of toxic mixture for spraying. g When the spraying operation is completed, liquid in bag I4 is then drained by raising the tank to a vertical position unseating the balls in exhaust valve l9 permitting the liquid to drain through'the sprayer 23 when stop cock i5 is opened; Liquid 7 within compartment Mid is drained through stop cock 'is at alow point.

The modification shown in Fig.4 is a combinal5 when the stop cock tion inlet valve and charger which maybe substitutedfor the two devices I8 and 25 shown in previous figures; v The structure includes'a cylin der 21'with removable caps at its ends; It is. connected near oneend with manifold l6, near its other end-with manifold l1, and centrally with valve 2!. Two disk 28 and 29 with central apertures divide the cylinder 21 into a central valve chamber 21a and reservoirs 21b and 210 A ball 24 is free to move in valve chamber 27a and when the cylinder 21 is in a vertical position seats against the lower apertured disk 28 or 29 as the case may Thus, the flow ofliquid through the cylin- In employing the modified inlet valve charger the operation of filling the compartments is the-same as th'at' previousl described.

It'is contemplated that other methodsmayibe employed to put toxic materials into waterintro duced into the sprayer From the foregoing it will be ployed without reference to other features and.

subcombinations. This is contemplated by and cock [5 is opened. Valve 2| is then opened and,

seen that this in- .vention is one well adapted to attain all of the .ends and objects hereinabove set forth together As many possible embodiments may be made of theinvention without departingfrom the scope thereof it is to be understood that all matter I herein set forth or shown in the accompanying 5 drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described our invention, we claim:

1. A portable sprayer comprising a tank re-' device and the means for introducing toxic material, and valves in said connecting means, whereby the spraying liquidsupplied underpre'ssure tor-one compartment when the tank isin one position forces previously furnished spray- 7 ing liquid fromthe other compartment through V thespray device and 'reversalof theitankjrefills the depleted compartment with jaj'spraying' liquid forcing the accumulatedfliquidjfroml the opposite compartment through the spray device. r V 2. A sprayer as in claim 1 inpwhich the valves in said connecting means are automatic in their 30 operation with the'reversal of the tank. 7 a I 3. A sprayer as in claim ;1 in which the tank is mounted on wheels.

4. A portable, sprayer comprising a tank' reversible'on its longitudinalaxis, means within 5 the tank for dividing it into two compartments 7 of variabl capacities, the" tank compartments having a constant,to'talicapacity, a liquid .pressure supplyv connection, a reservoir for toxic maa tank reversible won'its longitudinal axisjmeans within the tank for dividing it into twocompartments of variable capacities, the tank jcompartmentshaving aconstant total capacity, a liquid pressure supply connection, a unitary structure connected to the liquid supply connection,; said structure having two outlets, reservoirs-in the structure for toxic materials, an automatic valve in the structure interposed between the liquid supply connection and the reservoirs, a spraydevice, means connecting eachcompartmentwith an outlet and with the spraydevice, andautomatic valves in said connecting means, whereby toxic liquid charged to one compartment when the tank is in one position forces previously ac- V 'cumulated toxic liquid from theother compartment through the spray device and reversalof the tank refills the: depletedcompartmentwith toxic liquid forcing toxic liquidfrom the opposite compartment through the pray device. Q f v anti: ,wgwnxmsen.

- 1 :tCLARENCE E. WILKINSQNJ 

